Improvement in machines for sharpening reaper-knives



l or socket of a frame for i devices, hinged to. the post 'so as to be capable of an @sind dtyiilrr;

CHARLES C. HARDY, OF RUTLANYDQNEW YQR'K.

Letters .Patent No. 105,802, dated July 26, 1870.

IMPROVEMENT IN MACHINES FCR. SHARPENING REI-L'EER-KNIVES The Schedule refeired tcrin` these Letters Patent Vand makngpart 'of the same.

To whom 'it 'may concern.'

Be it known that I, CHARLEs C. HARDY, of Rutland, in the county of Jefferson and State of New York, have invented certain new and useful Improvements in Machines for Grinding and Sharpening Mower and lteaper-Knives, and for other purposes,V of which the following is a specification.

The'object of my invention is to produceV a niachine for sharpening thesect-ions of mower and reaper-kuives, in which the mechanism for `holding the knives shall be simple, easily operated, and not likely to get out of order, and yet adapted to grind the sections at, any angle desired, to allow the knife toV be vslipped along `and adjusted longitudinally to bring any section opposite thc grindstone, and to admit of the knife being pressed towardor drawn back, and

held away from contact with the stonewith facility. To this end,

My invention consistsl f First, in the combination with a .tubular post or "socket-piece, attached tn the socket, and is provided with a spline or stud to engage with a corresponding recess or groove in the socket-piece, the spindlebeing capable of turning upon its axis, so as to present the knife to the grindstone at any angle desired.

Second, in the combination with the tubular post supporting the knife-holding oscillatory movement toward and away from the grindstone, and provided with a projecting finger or stop, by which, when it is turned back a suitable distance from the machine, it and the knife-holding devices may be supported and upheld.

Third, in the combination with the oscillatory frame of a guide-bar, hinged to 'said frame, and a knife-holder bar held and 'arranged to slide 4longitudinally upon said guide-bar.

Fourth, in the construction of the guide and holderbars, ashhereinafter described. r

Fifth, in the combination with the grindstone of a knife-holding mechanism, constructed and `operating as hereinafter set forth.

The manner in which my invention is or maybe carried into eiect will be readily understood by reference to theaccompanying drawing, in which-- Figure l is a perspective view ot' a machine made in accordance with my invention.

Figure 2 is a longitudinal vertical section of the Same.

The grindstone A is supported in the frame B of the machine, in any ordinary or suitable manner, and is rotated by meansof a handle or other device usually employed for the purpose.

the knife-holding mechanism, of au adjustable upright spindle, which ts in To support the knife-holding devices hereinafter described, IA employ a spindle, a, placed opposite 'the face ofthe stone, and in order that"` the 'knives may bc readily reversed; so as to grind both edges, I employ two spindles, one at each end of the machine, to'

one or the other of which the knife-holding devices may be applied, according tothe circumstances of the case. l Y Each spindle is provided with a spline orstnd, b,`as Vshown in the drawing,V and is held in' place by a bolt, c, which passes upthrough it and the frame of the machine, and has formed on its upper end, which projects above the spindle, a screw-thread, upon which is screwed a nut,`cl. WVhen this'nutis loosened, the spindle can be turned and adjusted, and by tightening up the nut it will be again held immovable.

llhe spindle is .designed to it in al socket-piece' or tubular post, e, which has formed in-it a slot 'or groove, to receive the stud l), as shown in g. 1, so,

that the position of the socket-piece depends upon that ofthe spindle and stud, and by turning the' latter, the socket-piece, together with the knife-holding mechanism which it carries, maybe -set at a greater' or lesser angle to the stone, in order to grind the knife at .a corresponding` angle.

Thetnbular post e, at its upper end,` is provided with ears, to Which the oscillatory frame f is hinged, as shown clearly in iig. 1. This frame is provided at its lower part with a downwardly-projecting lfinger or stop, g, which, when the frame is swung'back a certain distance, as shown in Iig. 2, comes in contact with the top of the tubular post @preventing any further back movement of the franje, and upholdingl upon studs or journals proJecting from'the inner faces of ears formed on the top ofthe frame f.

This guide-bar is provided with metallic guides or clasps It, four iu'number in this instance, which' clasp and hold the metallic holder-bar l upon the bar h, so as to keeprthe two together, while they still allow the holder-bar l t0 slide longitudinally to and fro upon the guide-bar. By this means, that is to say, by moving the-holder-bar, any section of the knife may he brought in proper position to be operated on by the stone.v

The guide-bar is also provided with handles my, by meansof which thc knives' are held in position for griu'ding,vor are, turned back, away from the grindhe knives, the latter, when placed between the jaws,

`being held by means of a clamp-screw, o, with which each jaw is provided.

The operation of the devices herein described will be readily understood without further description.

The mechanism is simple, cheap, and not liable' to get out of order, and at the same time it admirably serves the purpose for which it is designed.

The two joints at the upper and lower ends of 'the oscillatory frame allow the operator to apply the knives to the stone with great facility and precision; the sliding holder-bar gives the longitudinal adjustments needed to present each section in turn to the stone; the adjustable supporting spindle allows the knife to be placed at any desired angle to the grindstone; and by the use of the two spindles, one at each end ot' tlre machine, the position of theknives may be quickly reversed, 'so as to grind both edges. u

Having now described my invention, and the man- ;ier in which the same is orv may be carried into efect, l

W hat I claim, anddesire t'o secure by Letters Pat- 1. The combination ol' the adjustable spindle and the stud or spline upon the same, with the' recessed or slotted socket-piece or tubular post which carries the knife-holding mechanism, substantially as and for the purpose set forth.

2. The combination with the tubular post or socketpiece of the oscillatory frame which carries the knifeholding and guide-bars, said frame being hinged to the post and provided with a linger or stop toopeand described.

3.' The guide-bar carrying the sliding knife-holder bar, and hinged to the oscillatory frame, so that it may be moved back and forth by the handles with which it is provided, substantially as shown and set forth.

4. The combination with the tubular post and the knifedlolder and guide-bars of an intermediate frame,A united by avhinged connection with both the post and the said bars, substantially as and for the purposes shown and set forth.

5. A machine for grinding the sections of mower and reaper-knives, the parts of which are constructed and arranged for `joint operation, as shown and set forth.

In testimony whereof I have signed my name to this specification before two subscribing witnesses.

GHAS. O. HARDY.

Witnesses WM. J Smits, JOSEPH W. Pack.

rate in connection therewith substantiallyas show'n 

